The best alternatives to Unotask are Simpli, Queue for Mac, and OneTask (Mac). If these 3 options don't work for you, we've listed a few more alternatives below.
Simpli is a mobile productivity app which integrates your email accounts, calendars, lists, notes and files, all with a neat tagging feature that enables you to label and link different items across multiple sources any way you like, for ease of organi...
Seque helps you plan, focus and optimize your time so that you can get more done in less time. Work distraction-free immersed in deep focus blocks. One task at a time. Increase your productivity by knowing when you work at peak performance. Plan Focus Optimize
Use the "Do this!" application to easily create to-do lists (shopping, tasks, etc.). You can create local and cloud to-do lists in the app. Share the link with anyone and monitor task progress in real time. Without registration and personal data.
Focus on the three most important tasks every day. To be really effective you have to pick up the three most significant tasks per day. A massive productivity improvement and considered by many experts to be the best to-do strategy. Look it up!
Donegood is a task tracker that shows you one task at a time. You can time box daily activities to stay on top of admin tasks, run a side-project, or use it for everything you work on. It's great for fast focus switching and time tracking.